With GRUB2 on Jessie, how do I increase the menu's font _size_ . A Google search wandered around my problem without addressing it.I did discover that that GRUB was using a resolution that matched my monitor's settings.
[When menu comes up go to command mode by typing 'c'. Then enter 'vbeinfo' to see list of supported resolutions. In my case the active resolution was listed as 1280 x 1024.]